| 摘要 |
<p>A pneumatic tire comprises a tread portion, at least two circumferentially and continuously extending longitudinal grooves being provided with the tread portion, a land portion divided between the longitudinal grooves, a plurality of lateral grooves being provided with the land portion, each lateral grooves with one end communicating with one of the longitudinal grooves and the other end extending toward a tire equator, the longitudinal groove with a groove wall to which lateral grooves are connected, in each section between lateral grooves adjacent to a circumferential direction of the tire, the groove wall having a protruded porti on and a dent portion being formed the nearest side of the tire equator, the protruded portion inclined with respect to the circumferential direction of the tire so as to gradually reduce a width of the longitudinal groove toward at least one lateral groove, and in a cross section of the groove wall, the protruded portion comprising a main surface which extends radially outside from the groove bottom of the longitudinal groove and a slant surface extending from a radially outer edge of the main surface to a ground contact surface of the land portion with an inclined angle larger than that of the main surface.</p> |
